Emilie Pietersoone, Jean Michel Létang, Simon Rit, Max Langer
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引用次数: 0
Abstract
We present a new, to the best of our knowledge, method to simulate diffraction images accounting for both coherent and incoherent effects, based on the Wigner distribution function of the exit wave. This permits the simulation of wave and particle effects simultaneously and simulates images photon by photon. It is motivated by artifacts observed in x ray phase-contrast images after phase retrieval, present as noise in the low spatial frequency range, which can make analysis of such images challenging. Classical simulations have so far not been able to reproduce these artifacts. We hypothesize that these artifacts are due to incoherent scatter present in the images, hence the interest in developing a simulator that permits the simulation of both diffraction and incoherent scattering. Here, we give a first demonstration of the method by simulating the Gaussian double-slit experiment. We demonstrate the capability of combining diffraction and incoherent scattering, as well as simulating images for any propagation distance.
据我们所知,我们提出了一种新方法,根据出口波的维格纳分布函数来模拟衍射图像,同时考虑相干和非相干效应。这种方法可以同时模拟波和粒子效应,并逐个光子地模拟图像。其动机是在相位检索后的 X 射线相位对比图像中观察到的伪影,这些伪影在低空间频率范围内表现为噪声,这使得对此类图像的分析具有挑战性。迄今为止,经典模拟无法再现这些伪影。我们假设这些伪影是由于图像中存在的非相干散射造成的,因此我们有兴趣开发一种能同时模拟衍射和非相干散射的模拟器。在这里,我们通过模拟高斯双缝实验首次展示了这种方法。我们展示了结合衍射和非相干散射以及模拟任何传播距离的图像的能力。
期刊介绍:
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.